Tools

Tag: DAY_OF_YEAR

In the following example we want to get the date of the specified day-of-the-year. We can define a calendar for a specific day of the year by setting the java.util.Calendar object DAY_OF_YEAR field using the set() method. The method take the field to be set and a value.

package org.kodejava.example.util;
import java.util.Calendar;
public class DayOfYearToDate {
public static void main(String[] args) {
// In the example we want to get the date value of the specified
// day of the year. Using the calendar object we can define our
// calendar for a specific day of the year.
int dayOfYear = 112;
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_YEAR, dayOfYear);
System.out.println("Day " + dayOfYear + " of the current year = "
+ calendar.getTime());
// If you want to get the date for a specific day of year and for
// a specific year, you can also pass the year information to the
// calendar object.
int year = 2020;
calendar.set(Calendar.YEAR, year);
System.out.println("Day " + dayOfYear + " in year " + year
+ " = " + calendar.getTime());
}
}

And here is an example result of the code above:

Day 112 of the current year = Sat Apr 22 00:34:10 WITA 2017
Day 112 in year 2020 = Wed Apr 22 00:34:10 WITA 2020

package org.kodejava.example.util;
import java.util.Calendar;
public class DayYearToDayMonth {
public static void main(String[] args) {
// Create an instance of calendar for the year 2017 and set the
// day to the 180 day of the year.
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, 2017);
cal.set(Calendar.DAY_OF_YEAR, 180);
// Print the date of the calendar.
System.out.println("Calendar date is: " + cal.getTime());
// To know what day in month of the calendar we can obtain the
// value by calling Calendar's instance get() method and pass
// the Calendar.DAY_OF_MONTH field.
int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
// Print which month day is it in number.
System.out.println("Calendar day of month: " + dayOfMonth);
// To know what day in week of the calendar we can obtain the
// value by calling Calendar's instance get() method and pass
// the Calendar.DAY_OF_WEEK field.
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
// Print which week day is it in number.
System.out.println("Calendar day of week: " + dayOfWeek);
}
}

In this example we want to create a calendar or date from year and day of the year. Next we will find out what day-of-week that calendar or date represent. In the code snippet below we are trying to find the 180 day of the year 2017.